JP2000237475A - Chamfering apparatus for plaster board and the like - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chamfering apparatus chamfering plaster board or the like efficiently with less labor. SOLUTION: On an L-shaped base member 16 brought into contact with the surface and the side face of a material to be chamfered such as a plaster board 10 via a lateral part 12 and a vertical part 14, a disc cutter 18 with a tilted blade face for chambering the corner of the material to be chambered positioned at the corner part between the lateral part 12 and the vertical part 14 is mounted rotationally to a mounting shaft arranged in the longitudinal substantial center position of the base member 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cloth for affixing to a wall or ceiling of a building, and a chamfering tool for a gypsum board or a control panel (hereinafter, referred to as a gypsum board) as a base material of a surface material.

[0002]

2. Description of the Related Art When a gypsum board or the like is added and pasted, a step may be formed at a joining portion due to a manufacturing error, a surface accuracy of a base material, or the like. When a step is formed, unevenness occurs on a cloth or a surface material stuck thereon. Therefore, a joining portion of a surface of a gypsum board or the like is chamfered, and a putty is inserted into this space to level it.

[0003]

Conventionally, this chamfer is
Although a planer-like tool using a cutter knife was used, considerable skill was required to uniformly chamfer the entire length. In particular, since paper is mixed in the gypsum board, depending on the degree of contact with the blade surface, the paper is rolled up, resulting in poor finish and reduction in work efficiency.

[0004] In addition, since these tools have fixed blade surfaces, they always hit the same place, resulting in a decrease in sharpness. Furthermore, if it is set for the right hand, it can only be operated with the right hand, so when chamfering the left side of the gypsum board, the gypsum board must be replaced with the right side, which requires labor and reduces efficiency. Was coming.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and it does not cause a decrease in sharpness, can always produce a clean finish, can be easily operated by anyone, and has a high efficiency such as gypsum board. A chamfer was developed.

[0006]

SUMMARY OF THE INVENTION Under the above-mentioned problems, the present invention relates to an L-shaped base material which abuts a surface and a side surface of a chamfered material such as a gypsum board at a horizontal portion and a vertical portion. Gypsum characterized in that a disc cutter having a beveled surface so as to chamfer the corner of the chamfered material existing in the corner portion of the base and the vertical portion is rotatably mounted on a mounting shaft provided in the front and rear center positions of the base material. Provide chamfering tools such as boards.

By taking the above means, the horizontal and vertical portions of the base material are pressed against a chamfered material such as a gypsum board, and are pulled like a planer, so that the base material is uniformly spread over the entire length. Can be chamfered. In addition, since the blade used is a rotating disk cutter, the entire circumference hits evenly, the life is long, and the sharpness does not decrease. Furthermore, since the horizontal and vertical portions of the base material applied to the chamfered material are located back and forth around the disk cutter, it can be operated with either the right hand or the left hand, reducing labor and improving efficiency. .

Further, according to the present invention, in the above-mentioned chamfering tool, the longitudinally extending direction of the vertical portion centering on the mounting shaft is opened outward at a predetermined opening angle, and the chamfered material is provided on the lower surface of the disk cutter. Provided is a means for attaching a rotating plate which is slid and rotated. By these means, the biting and cutting properties of the disk cutter with respect to the chamfered material are improved.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view (excluding a cover plate described later) showing an example of the chamfering tool of the present invention, FIG. 2 is a front view, FIG. 3 is a side view, and FIG. 4 is a sectional view taken along line AA of FIG. However, this chamfering tool is a base material 16 which presses an L-shaped horizontal portion 12 and a vertical portion 14 against a chamfered material 10 such as a gypsum board, and a chamfered material rotatably held by the base material 16. And a disk cutter 18 acting on the disk cutter 10.

The base member 16 is formed by forming the horizontal portion 12 and the vertical portion 14 into an L-shape in side view. 12 is formed at an angle of about 45 ° with respect to the surface of
A mounting shaft 22 protruding from the rear surface side is non-rotatably protruded from the front surface of the motor. The mounting shaft 22 of this embodiment has a screw hole 22a formed in the shaft core.

The disk cutter 18 is mounted so as to be fitted onto the above-mentioned mounting shaft 22. In this case, two washers 24 and 26 are interposed on the front and back surfaces of the disk cutter 18, respectively. Improves rotation. Incidentally, the disc cutter 18 and the washers 24 and 26 in the present embodiment form a concave hole 28 on the surface of the embossed portion 20 and are accommodated in the concave hole 28.

A cover plate 30 is fitted over the surface of the recessed hole 28 so as to be fitted to the mounting shaft 22, and a holding screw 32 such as a thumb screw is inserted from the surface of the cover plate 30 into a screw hole 22 a of the mounting shaft 22. To screw. In this case, the lower part of the cover plate 30 is provided with a pressing part 30a for pressing the vicinity of the outer periphery of the disk cutter 18 from above.
Is provided, and the disk cutter 18 is
Prevents escape to the top when biting into.

The cover plate 30 is pressed and fixed to the raised portion 20 by screwing the holding screw 32 into the mounting shaft 22. Even in this case, the cover plate 30 is recessed so as to allow the disk cutter 18 to rotate. The depth of the hole 28 is set. still,
The disk cutter 18 of the present embodiment is configured by a double-edged blade surface 18a having inclined edges formed on both sides on the outer periphery.

As described above, the disk cutter 18 is mounted on the horizontal portion 1.
2 is attached to the raised portion 20 at an angle of about 45 ° with respect to the front surface of the second portion. At this time, the outer periphery is set so as to protrude downward from the back surface of the horizontal portion 12 and slightly enter the vertical portion 14. . However, since the disk cutter 18 must be allowed to rotate, the disk cutter 18 has a slimming portion 34 on the interfering portions 12 and 14.

The scum 34 also serves as a window 34 for discharging chips generated at the same time as the chamfering operation. It is provided in a low position.

As described above, the vertical portion 14 is lowered in the direction of 90 ° with respect to the horizontal portion 12, but extends in the front-back direction at a predetermined opening angle α around the mounting shaft 22. (Figure 1). The role of the opening angle α will be described later.

Next, a case where the corner of the chamfered material 10 is chamfered by the chamfering tool having the above configuration will be described. First, the chamfered material 10 is placed on an appropriate table 36 or the like and placed (the end is viewed from the table 36). The horizontal portion 12 and the vertical portion 14 of the base member 16 are pressed against the upper surface and the side surface of the chamfered material 10.

Then, the disk cutter 18 cuts into a corner existing at a corner portion formed by the horizontal portion 12 and the vertical portion 14 of the chamfered material 10. When the vertical portion 14 is pulled so as not to separate from the side surface of the chamfered material 10, the disk cutter 18 moves while rotating, and during that time, is chamfered. Then, the chips generated during the chamfering are discharged from the above-described discharge window 34.

In view of this, the portion of the base material 16 in front of the disk cutter 18 is not necessary.
The reason why the base material 16 is provided before and after the disk cutter 18 is that
This is for both right and left hand use. In Figure 1,
The portion before the disk cutter 18 is for the left hand, and the portion on the other side is for the right hand. And the above-mentioned opening angle has meaning here.

In other words, it is preferable that the disk cutter 18 satisfactorily bites into the chamfered material 10 at the time of chamfering. For this purpose, the disk cutter 18 may be bitten and tilted. However, if both hands are used in this way, one is good but the other is poor. For this reason, even if the opening angle α is provided and the front and rear inclination of the disk cutter 18 is set to zero, the vertical portion 14 is pressed against the side surface of the chamfered material 10 to cause biting. . However, as described above, when the lower blade surface 18a of the disk cutter 18 has the inclination angle β, the opening angle α needs to be larger than the inclination angle β.

FIG. 5 is a cross-sectional view showing another embodiment of the present invention. In this embodiment, an abutment plate 38 is provided on the lower surface of the disk cutter 18 for sliding contact with the chamfered material 10. It is preferable that the surface of the abutment plate 38 is provided with irregularities or the like so as to have a high friction coefficient. Further, the abutment plate 38 is integrated with the disk cutter 18 by pins 40 or the like.

When the base material 16 is pressed against the chamfered material 10 to be chamfered, the abutment plate 38 rotates without slipping with respect to the chamfered material 10. At this time, the periphery of the blade surface 18a of the disc cutter 18 is rotated. Since the speed is higher than the moving speed of the base material 16, the cutting performance is further improved.

Although the embodiment of the present invention has been described above, the present invention is not limited to the above description.
The technical idea is implemented with various modifications within the same range. For example, the chamfered material is not limited to gypsum board, but may be various. In addition, the size and thickness of the disk cutter are also arbitrary, and furthermore, the formation of the blade surface is
A single blade having an inclined edge formed on one side may be used.

[0024]

As described above, if the chamfering tool according to the present invention is used, anyone can easily bevel a gypsum board or the like, and
You can finish it neatly. Further, since the operation can be performed with either the left or right hand, there is no need to change the direction of the gypsum board or the like, which is labor-saving and improves efficiency.

[Brief description of the drawings]

FIG. 1 is a plan view of a chamfering tool showing an example of the present invention.

FIG. 2 is a front view of a chamfering tool showing an example of the present invention.

FIG. 3 is a side view of a chamfering tool showing an example of the present invention.

FIG. 4 is a sectional view taken along line AA of FIG. 1 showing an example of the present invention.

FIG. 5 is a sectional view of a disk cutter portion showing another example of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Gypsum board etc. 12 Horizontal part 14 Vertical part 16 Base material 18 Disk cutter 22 Mounting shaft 38 Backing plate

Claims (3)

[Claims] 1. An L-shaped base material which abuts on the surface and side surfaces of a material to be chamfered such as a gypsum board at a horizontal portion and a vertical portion, and a corner of the material to be chamfered at a corner portion of the horizontal portion and the vertical portion. A chamfering tool such as a gypsum board, wherein a disk cutter having an inclined blade surface so as to chamfer is rotatably mounted on a mounting shaft provided at a central position in the front-rear direction of a base material. 2. The chamfering tool such as a gypsum board according to claim 1, wherein a longitudinal extension direction of the vertical portion around the mounting shaft is opened outward at a predetermined opening angle. 3. A chamfering tool such as a gypsum board according to claim 1, wherein a backing plate is provided on the lower surface of the disk cutter so as to rotate in sliding contact with the chamfered material.